Tendon of Todaro

The tendon of Todaro is part of the fibrous skeleton of the heart, located in the right atrium. It was described^{[citation needed]} by Italian anatomist Francesco Todaro. It is a continuation of the Eustachian valve of the inferior vena cava and the Thebesian valve of the coronary sinus.

Tendon of Todaro
Details
Synonyms	tendon of inferior pyramidal space, tendon of valve of inferior vena cava
Identifiers
Latin	tendo spatii pyramidalis inferioris (TA2) tendo valvulae venae cavae inferioris (TA98)
TA2	3981
Anatomical terminology [edit on Wikidata]

Dissection in right anterior oblique view of the right atrium. TT: tendon of Todaro; ER: Eustachian valve, CSO: coronary sinus

It delimits the antero-superior boundary of the triangle of Koch. The apex of Koch's triangle is the location of the atrioventricular node.^[1]

The tendon is near-impossible to locate in a living heart, so clinicians use other features to determine the boundaries of the Koch's triangle.^[2] Some cardiologists even go as far as rejecting the usefulness of the tendom as an anatomical landmark altogether.^[3]